Best Tune up kit? $$

[Red97XJ]

One of the recent 4x4 magazines did a Write up on there XJ, where they did some exhaust stuff and a tune up and gained nearly 5 MPG! I think the tune up kit was called something like a Screamin deamin? It had a coil, cap and rotor, and some 10mm live wires.

Where is the cheapest place to get this kit? When I first read the article, I saw the kit somewhere for around $170, but I assume someone has is cheaper.

Any other kits you guys recomend? She has got 84,000 miles, and I think all stock stuff. It Idles a pretty ruff if I feed it the 87 octane, but does fine on 92. I hope a tune up will fix that and help mileage as I am only getting around 13.8. Mostly back road driving, not in town, not highway.

I have not swapped gears, and run 32's. I have 3.5 stock ratios.

Thanks!
Jason

[XTrmXJ]

Change the gears and your fuel milage will increase a lot then work from that

[XJ_ranger]

4.11 if you only want to keep 32's and have no desire to go bigger

4.56 if you want to upgrade some day...

[Red97XJ]

does anyone know where those different ratios would put my RPM's at about 65mph? I drive alot at 65-70, but hardly ever over 75.

I MAY someday go with 33's, but probably not, I feel "safe" with the factory axles and the little 32" tires. I know it can still break, just less likely.

What should I expect to pay for the whole deal installed? I can't do it.

thanks,
Jason

[Gridikal]

not pertaining to your thread but HEY I gotta 97 XJ and my names Jason too!:looney: - maybe were ina parallel universe or something